Muffler.



P. W. MASTEN.

MUFI'LEB.

loulou FILED une, 1913.

l APPL 1 ,094,667. Patented Apr. 28, 1914.

1554 j 4 7 yg t i It is a further object of my invention to hollow cylindrical body, and a removable illustrative purposes only: Figure 1 is a PHILO W. MASTEN, 0F LOS ANGELES, CALIFORNIA.

MFFLER.

Specication of Letters Patent.

Patented Apr. 28, 1914.

Application led January 6', 1913. Serial No. 740,556.

To all whom t may concern:

Be it known that I, PHILo W. MASTEN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and :State of California, have invented a, new and useful Muiiler, of which the following is a specication. v

My invention relates to improvements in muilers used in connection with internal combustion engines.

The exhaust from internal combustion engines produces a sharp report or noise at each time the exhaust leaves the cylinder of the engine, which noise is due to the fact that the exhaust is usually discharged from the cylinder at two or three times an atmos-v phere and the resultant impart and expansion of the exhaust.

M invention is particularly designed to brea up the exhaust and to allow the same to expand to nearly an atmosphere 4within the muiiler.

produce va mufler of simple form and construction m which the mutller comprises a means within'the bodyI for breaking up the exhaust, which may be readily removed from the cylindrical body at the same time removing from the 'interior of the body all foreign substances. v

Referring to the drawings, which are for longitudinal, sectional view of the muiler embodying a form of my invention. Fig. 2 is a longitudinal, sectional view of the muler embod ing a modified form ofmy invention. Fig. 3 is a longitudinal, sectional vieW of the muliler embodying another modified form of my invention. Fig. 4 is an end view of the muiiler shown in Fig. 1. Fig. 5 is a sectional view on line fc5-x5 Fig. 2.

The muiler shown in Figs. 1 and 4 consists of a cylindrical body or casing l provided at its inner end 2 with an interiorly threaded circular :flange 3 adapted to bel connected by means of any common formof pipe or coupling (not shown) to the exhaust of an internal combustion engine, the outer end 4.- of the casingl being open, as shown. Arranged longitudinally with the body or casing l within the same is a rod or core 6 of a spiral brush 7, which spiral brush 7 consists of a series of wires 8, the inner ends of which are secured to the core i 6 in any wellkno'wn manner, andthe outer ends of whichextend to the innerwalls of the casing 1l thereby supporting the brush within the casing. The brush 7 extends throughout the entire length of the muiler andis held in fixed longitudinal relation to the casing withinthe same by means of i a plate or latch 9 pivoted at 10 to t-he end 4'of the casing, the latch 9 being provided with anotch 11 adapted Ato be engaged by a threaded pin '12 mounted on the end 4 of the .casing opposite to the pivotal point of the latch 9. 13 designates a thumb-*nut o nthe pin 12 by means of; which the latch. 9 'may be secured in xed relation against theend of the casing.

In the form shown in Fig. 2 the means for breaking up theexhaust within the casing l 1, which casing is of substantially the same form as that shown .and-described with relation to Fig.` 1, consists of a rod 15 having a head 16 on the inner end thereof. Upon the rod 15 ismounteda series of thin metallic disks 17 each providedwwith aseries of radial slots 18 which extend inwardly from the outer edge ofthe respective disks toward the center ofthe-same. The. lates 17 are spaced apart on the rod 15 y means of sleeves 19,.there being a sleeve 19,011 the rod 15 between each disk. 20 designates a nut onI the outer threaded. end 21 of the rod 15, which nut.20 abuts against the last sleeve on the outer end of the rod 15 thereby holding the respective disks 17 yin fixed.4

taining the rod 15 and the disks 17 thereon within the casing.

In the form shown in Fig. 3 the'mea'ns within the casing for breaking up the exhaust consists of a thin metal plate 25 bent in spiral form, the inner end 26 .of the plate abutting against the inner. end 2 of the casing, and the outer end 27 of theplate 25 abutting against the locking bar 9. In this form the plate is slotted inwardly from the outer edge thereof toward the center of the same there being a series of slots 30 ex tending throughout the length of the plate.

In each form of my invention the casing 1 is made of considerably larger diameter` than the inlet of the same from the exhaust and Ain each case the exhaust` breaking up means within the casing. extends entirely across the internal diameter of the casing.

In the form shown in Figs. 1 and 3 the exhaust breaking upmeans is in spiral formV so that the exhaust as it enters the casing is given a spiral movement passing through a spiral passage formed in Fig. 1 by the spiral brush and in Fig. 3 by the spiral plate. As the exhaust passes through the spiralgpassage so formed inthe respective forms of muiier shown in Figs. 1 and 3, the expansion of the exhaust causes the same to pass or expand through the bristles of the brush in the form shown in Fig. 1, 0r through the slots 18 in the plate 25 shown in Fig. 3, as the case may be. Y

In the form shown in Fig. 2 the exhaust is caused to pass through the slots in the respective disks 17, there being no passage leading from one end of the muii'ler to the other. I prefer, however, the ormof mufiler shown in Fi s. 1 and 3, which is in general terms a cylin rical casing having therein a divisional wall, spiral in form, extending longit-udinally through the casing, which wall is provided wit-h a series of slots or openings therein, resulting in a spiral movement of the exhaust through the muier which accelerates the breaking up of the exhaust as the same is permitted to expand either through the bristles of the brush shown in Fig. 1 or through the slots in the AI do not limit myself to the articular form and construction of the brea ing up means disclosed in either Fi 1 or Fig. 3 of the drawings, but intend t at my invention shall cover any form of muvier in which the exhaust is broken up by means of obstruction within the muffler, which Vobstruction is provided with a slotted form of breaking up means.

What I claim is f 1. A muiler comprising a cylindrical casing having an open outer end, inlet means on the opposite end for introducing engine exhaust into said casing, a removablelongitudinally disposed spiral wall in said casing, said wall having a. series of radially disposed slots extending inwardly from the edge thereof, and means for retaining said wall in said casing.

2. A muffler comprising a cylindrical casling having an open outer end, inlet means on the oppositel end for introducing engine exhaust into said casing, a` removable longitudinally disposed spiral wall in said casing,

said wall having a series of radially disposed slots extending inwardly from the ed e thereof, a plate pivoted on one side of said casing at the outer end thereof adapted to extend across the outer end thereof, a threaded pin on the opposite side of said casing, said plate having a notch adapted to be enplate shown 1n Fig. 3; butit is understood that gaged by said pin, anda nut on said pin for securing said plate in fixed position across the outer end of said casing.

` 3. A muffler comprising a hollow cylindrical casing having exhaust and admission openings at opposite ends, a brush center located at the axis of said cylinder, and brush members forming a perforated wall extending spirally around said center from end to end of said casing. v

L1. A-muiiler comprising a hollow cylindrical casing having exhaust and admission openings at opposite ends thereof, anda removable spiral brush extending longitudinally in said casing and adapted to engage the inner wall of said casing and to clean said wall when said brush is being removed.

5. A mufier comprising a casing having exhaust and admission openings at opposite ends thereof, a rod placed axially in said casing, and a spiral wall extendin from said rod to said casing, said wall aving openings to relieve excessive ressure and said wall being attached to sai rod and removable therewith.

6. A mufer comprising a hollow cylindrical casing having exhaust and admission openings at opposite ends, and brush members forming a 'perforated wall extendin spirally around said center from end to en of said casing, said brush members being attached to said brush center and removable therewith.

7. A muiiler comprising la hollow cylindrical casing having an opening at one end to admit gases and an opening at the other end to allow the gases to pass out, a central rod at the axis of said casing, and a wall extending from said center to the inner surface of said casing and forming a spiral passage between/ said openings, said wall having openings to relieve excessive pressure and' being attached to said rod and removable therewith.

8. A mufiier-comprising a hollow cylindrical casing provided with admission and exhaust-openings at opposite ends, a removable longitudinally disposed spiral wall engaging the inner surface of said cylinder said wall having openings therein, an means for retaining said spiral wall in said cylinder. i

-9. A muffler comprising a hollow cylindrical casing having openings at either end thereof, and a brush forming a spiral passage between the openings, said brush being removable and engaging and cleaning. the walls of said casing during removal.

10. A muiiler comprising a hollow casinff, a brush center in said casing, and brush members extending from said-center to the inside of said casing.

11. A muier comprising a hollow casing a removable brush center in said casing, and brush members secured to said center and sov extending from said center to the walls of said casing. g

l2. A muffler comp-rising a hollow cylin-y drical casing, a brush center located at the axis of said casing and brush membersA extending from said center to the inside of said casing.

13. A muffler comprising a hollow cylindrical casing having admission and exhaust v openings at either .end thereof, a brush center located at the axis of said casing and readily removable therefrom, and brush members extending from said center to the inner walls of said casing.

In testimony whereof, I have hereunto 15 set my hand at Los Angeles, California, this 30th day of December, 1912.

PHIL() W MASTEN.

In presence of FRANK L. A. GRAHAM, LORRAINE E. DURRow. 

